Only if you don't know anything about Manhattan other than "density". The now-canceled project would have affected, at a minimum, about 10% of New York's entir

Only if you don't know anything about Manhattan other than "density". The now-canceled project would have affected, at a minimum, about 10% of New York's entire resident population (~800k). A lot of New Yorkers actually live in Manhattan south of 60th. That's part of why it's dense. A more reasonable comparison to the current London congestion area would be midtown -- the small area in the middle of Manhattan with the obvious skyscrapers, as well as Times Square, theaters, throngs of tourists, and the bulk of finance.